Operation CHARM
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Mercury
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1987
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Topaz AWD L4-140 2.3L HSC
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Repair and Diagnosis
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Engine, Cooling and Exhaust
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Engine
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Tune-up and Engine Performance Checks
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Ignition Timing
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Testing and Inspection
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Steps 13 Through 14
Steps 13 Through 14
Spark Timing, Steps 13 thru 14: